Power-transmission device.



N0.84a,o96. PATENTBD MAR. 2O, 1907, L. FRITS'OHKA O O. KOOH.

POWER TRANSMISSION DEVISE. APPLICATION FILED JUNE 28, 1906.

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L ERIISCHKA & C KOCH POWER TRANSMISSION DEVICE.

APPLIoATlN FILED JUNE 2s. 1906.

WZL/(2665@ r. ww v 1HE NoRms Fgrsws co., wasnmc'raw. ncV LEO FRITSCHKAAND CARL KOCH, OF CHICAGO, ILLINOIS,

POWER-TRANSMISSION DEVICE.

Specification of Letters Patent.

Patented March 26, 1907.

Application iiled June 28,1906. Serial No. 323,959.

To a/ZZ whom it may concern:

Be it known that we, LEO FRITscr-IKA and CARL Koen, citizens oftheUnited States, residing at Chicago, in the county of Cook and State ofIllinois, have invented certain new and useful Improvements inPower-Transmission Devices, of which the following is a specification.

Our invention relates to improvements in power-transmission devices, andrefers to a device of this character particularly adaptable for use onmotor-vehicles.

The object of our invention is the provision of a frictionalpower-transmitting device which may be readily operated to change thespeed of the driven element or to reverse the movement of the saidelement.

A further object of the invention is to provide a device of thecharacter stated which may be used for stationary work as well as forthe propulsion of vehicles, which will be of simple and durableconstruction, and which will be reliable and effective in operation.

With these and other objects in view our invention consists of adriving-gear, a friction-disk driven thereby, a driven gear radiallymovable on the friction-disk operating a bevel-gear, a driven shaft withspaced bevelgears thereon, means for shifting the driven bevel-gear toengagement 'with the spaced bevel-gears, and means for shifting thedriven gear on the friction-disk to change the speed thereof.

Our invention also consists of certain other novel features ofconstruction, combination, and arrangement of parts, substantially asdisclosed herein.

Figure 1 is a side elevation of a motor-vehicle with parts broken awayto show our power-transmission device installed therein. Fig, 2 is a topplan view of the same. Fig. 3 is a side elevation, partly in section, ofthe complete friction transmission and shifting means. Fig. 4 is atopplan view thereof.

In the drawings the numeral 1 designates the body of the vehicle,supported in the usual manner upon the wheels 2.

Suspended from the running-gear is a Jframework 3, mounted at theforward end of which is a motor 4, either electric or otherwise.

Vertical bearings 5 are mounted on thetransverse bars 6 in rear of themotor, and in the lower bearing is secured a shaft 7, having a lowerthreaded end engaged in the threaded bearing. Lock-nuts 8 are securedupon the shaft at each end of the bearing, and above the uppermostlock-nut a washer 9 is provided.

Iotatably mounted above the washer on the shaft is a friction-disk 10,formed with an annular rim 11 on the lower face thereof.

A standard 1.2 is mounted upon the upper end of the shaft or post 7 andis formed with the upper shouldered end 13 engaged in the upper verticalbearing. This standard is further formed withl a ljournal-bearing 14 ona plane parallel to the face of the disk.

A bracket 15 is mounted upon a bolt-stem 16 at the rear side of thefriction-disk, and in the bracket is journaled a grooved guiding andsupporting roller 17, which engages the annular rim on thefriction-disk.

A driving-gear 1S on the motor-shaft engages the face of thefriction-disk at the forward edge thereof.

Journaled in the horizontal bearing ofthe standard is a horizontal shaft19, formed with a longitudinal groove or keyway 20, and slidable on saidshaft is a gear 21, having an internal lug or key to engage the keywayon the shaft. This gear is in contact with the friction-disk and may beprovided with a friction-surface, and the driving-gear may be providedlikewise. The driven gear 21 is provided with a hub 22, formed with anarfnular groove 23 to receive the arms of the shifting-fork 24.

In the application of our invention to an auto vehicie the rear axie maybe driven directly by the driven gear and shaft, (illustrated in Fig. 1or a counter-shaft may be employed and the rear wheels driven bychain-andsprocket connections. (Not shown.) In the former case spacedand oppositely-facing bevel-gears 25 are rigidly mounted upon the rearaxle or power-shaft 25', and a bevel-gear 26 is mounted upon the rearend of the driven shaft and is adapted to engage the bevelgears on therear axle. The bevel-gears are spaced on the axle so that the drivingbevelgear may not come in contact with both gears at the same time, andthe said drivinggear is shifted between the bevel-gears in the followingmanner: A bearing or journal block 27 is carried by the frame near therear end of the driven shaft, and journaled in the block is arocker-shaft 28. The rocker-shaft IOO is secured in the block againstlongitudinal movement by means of the retaining-collars 29. The freeextended end of the rockershaft is formed with heavy threads 30, andsupported on said threaded end is a movable journal-block 31, in whichis journaled the driven shaft. A rocker-arm 32 is secured to therocker-shaft and is connected by the link 33 to the reversing-lever 34.The shiftingfork 24 is pivoted in a bracket 35 and is connected by alink 36 to the speed-changing lever 37. These levers may both bejournaled on the same rod or bolt 3S, so as to engage opposite sides ofthe segment-bar 39. By shifting the reversing-lever the rockershaftforces the driving bevel-gear into engagement with one of thebevel-gears on the axle or shaft and by shifting the lever in thereverse direction the direction of the rotation of the driven element isreversed. The bevelgears also act as a clutch, as the members may bethrown out of engagement by shifting the reversing lever and throwingthe driving bevel-gear to a neutral point midway between the drivenbevel-gears and out of engagement therewith. To change the speed of thedriven member, the speed-changing lever is shifted, which moves thefriction-gear radially on the friction plate or disk, thereby changingthe speed of rotation. The parts are all adjustable, so that lost motionmay be accounted for at any time.

We have described our improved driving arrangement particularly asapplied to a motor-vehicle, but of course it will be understood that thedevice may be used wherever variation of speed or reversal of motion isrequired.

It will be understood that various alterations may be made in theconstruction of the device without departing from the spirit of theinvention, and what we claim as our invention, and desire to secure byLetters Patent, is set forth in the appended claims.

We claiml. In a power-transmission device, the combination with afriction-disk, a drivinggear therefor, of a driven gear in contact withthe friction-disk and capable of radial movement thereon, a driven shaftand bevel-gear,

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a power-shaft, spaced bevel-gears thereon, and means for shifting thedriven bevel-gear between the spaced bevel-gears.

2. In a pewer-transmission device, the combination with a friction-diskand a driving-gear therefor, of a driven gear radially slidable on thefriction-disk, a. driven bevelgear, a power-shaft, spaced bevel-gearsthereon, a rocker-shaft for shifting the driven bevel-gear between thespaced bevel-gears, and means for shifting the driven gear on thefriction-disk.

3. A transmission device comprising a frietion-disk, a driving-gear inengagement therewith, a driven gear radially movable on the disk,shifting means for said gear, a driven bevel-gear, a rocker-shaft forlaterally shifting said bevel-gear, and spaced bevel-gears adapted forengagement with the driven bevel-gear.

4. The combination with a friction-disk, of means for supporting thedisk, a d riving-gea r engaging the disk, a shaft pivoted centrally overthe friction-disk, a driven gear on said shaft capable of radialmovement on the disk, a driven bevel-gear, a rocker-shaft havingthreaded engagement to shift the dri ven shaft, a power-shaft, spacedbevel-gears thereon adapted for engagement with the driven bevel-gear.

5. The combination with a friction-disk, a pivotal post for the disk,means for supporting the edge of the disk, a journal-bearing pivoted onthe post, a shaft in said bearing, a gear on the shaft radially slidableon the frietion-disk, means for shifting said driven gear, and abevel-gear on the driven shaft,oi` a rocker-shaft having threadedengagement and adapted to shift the driven shaft laterally, apower-shaft, and spaced opposing bevel-gears on said power-shaft adaptedfor engagement with the driven bevel-gear.

In testimony whereof we haye hereunto signed our names in the presenceof two subscribing witnesses.

LEO FRITSUIIKA. CARL KOCH. In presence of- J. C. GoosMANN, Jon CLIFTON.

